The figures below depict hypothetical room-temperature random polycrystalline grain structures (at the same magnification) for the same single-component metal. Which of these structures is expected to...

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Extracted text: The figures below depict hypothetical room-temperature random polycrystalline grain structures (at the same magnification) for the same single-component metal. Which of these structures is expected to provide the lowest yield stress? Justify your answer. (b)